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Dive into the research topics where Dule Zhao is active.

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Featured researches published by Dule Zhao.


Archives of Phytopathology and Plant Protection | 2013

Host response of rice genotypes to the rice root-knot nematode (Meloidogyne graminicola) under aerobic soil conditions

Dirk De Waele; K. Das; Dule Zhao; R.K.S. Tiwari; D.K. Shrivastava; C. Vera-Cruz; Arvind Kumar

Aerobic rice is a production system where adapted rice varieties are established via direct seeding in non-puddled, non-flooded, non-saturated fields and grown under conditions similar to upland conditions. On land cultivated continuously with aerobic rice, a yield reduction has been observed. The rice root-knot nematode Meloidogyne graminicola is considered one of the possible causes of these yield reductions. Resistance to and tolerance for M. graminicola are essential traits for aerobic rice cultivars in alleviating this problem. In our study, the host response of nineteen aerobic, seven upland and four lowland rice genotypes which are either being used in the International Rice Research Institute’s aerobic rice breeding programme or already cultivated by farmers in Asia was evaluated under aerobic soil conditions in an outdoor raised-bed experiment. Our study showed a large variation in susceptibility and sensitivity to M. graminicola infection among the rice genotypes examined. Resistance comparable to the resistant reference genotypes included in the experiment (CG14, TOG5674, TOG7235) was not found but in terms of susceptibility, the upland genotype Morobereken may be an interesting less-susceptible genotype. Tolerance was found and in terms of sensitivity, the high yielding aerobic genotype IR78877-208-B-1-2 may be an interesting tolerant genotype. Our study also allowed the identification of rice genotypes that are either highly susceptible or sensitive to M. graminicola infection and of which the cultivation should be discouraged. On average, M. graminicola caused an almost 30% reduction in yield. Excluding the two susceptible and three resistant reference genotypes included in the experiment, most affected was dry-shoot biomass (23.6% reduction) followed by root length, which was more affected than fresh-root weight (19.8 vs. 8%) and grain filling (17.3%), while plant height and the number of spikelets/panicle were less affected (10.2 and 8.1%, respectively). Neither tillering nor the number of panicles/plant were affected.


Food Chemistry | 2018

Quality evaluation, fatty acid analysis and untargeted profiling of volatiles in Cambodian rice

Jeanaflor Crystal T. Concepcion; Sothea Ouk; Arthur Riedel; Mariafe Calingacion; Dule Zhao; Makara Ouk; Mary J. Garson; Melissa A. Fitzgerald

This study provides the first investigation of the physical traits, pasting properties and volatile compounds of Cambodian rice cultivars, including traditional, improved, and improved traditional varieties, allowing for their differentiation as high and low quality rice. Analysis of the grain quality traits illustrates interesting features of traditional varieties and correlations between traits that assist with understanding texture. Untargeted profiling of volatile compounds shows that high quality fragrant varieties not only contain 2-acetyl-1-pyrroline but also several other compounds, including aldehydes, alcohols and 2-alkylfurans that contribute to overall aroma. Moreover, low odour threshold volatile compounds, which can be derived from the oxidation of unsaturated fatty acids, were more abundant in the fragrant varieties. The percentage area of both oleic and linoleic acid were found to be significantly different among the rice varieties tested. Such findings suggest that unsaturated fatty acids in milled rice contribute to rice fragrance, and thereby to overall quality.


Theoretical and Applied Genetics | 2009

Identification and characterization of large-effect quantitative trait loci for grain yield under lowland drought stress in rice using bulk-segregant analysis

Ramaiah Venuprasad; Cheryl Dalid; M. Del Valle; Dule Zhao; M.J. Espiritu; M. T. Sta Cruz; Modesto Amante; Arvind Kumar; Gary N. Atlin


Field Crops Research | 2006

Developing selection protocols for weed competitiveness in aerobic rice

Dule Zhao; G.N. Atlin; L. Bastiaans; J.H.J. Spiertz


Field Crops Research | 2007

Interaction of genotype × management on vegetative growth and weed suppression of aerobic rice

Dule Zhao; L. Bastiaans; G.N. Atlin; J.H.J. Spiertz


Field Crops Research | 2009

Yield and yield-attributing traits of rice (Oryza sativa L.) under lowland drought and suitability of early vigor as a selection criterion

Arvind Kumar; Satish Verulkar; Shalabh Dixit; Bhagirath S. Chauhan; Jérôme Bernier; Ramaiah Venuprasad; Dule Zhao; M. N. Shrivastava


Field Crops Research | 2009

Response of aerobic rice growth and grain yield to N fertilizer at two contrasting sites near Beijing, China

Limeng Zhang; Shan Lin; B.A.M. Bouman; Changying Xue; Fengtong Wei; Hongbin Tao; Xiaoguang Yang; Huaqi Wang; Dule Zhao; Klaus Dittert


Crop Science | 2010

Developing aerobic rice cultivars for water-short irrigated and drought-prone rainfed areas in the tropics

Dule Zhao; Gary N. Atlin; Modesto Amante; Ma Teresa Sta Cruz; Arvind Kumar


Field Crops Research | 2015

The need for new tools and investment to improve the accuracy of selecting for grain quality in rice

Jeanaflor Crystal T. Concepcion; Makara Ouk; Dule Zhao; Melissa A. Fitzgerald


Journal of Plant breeding and Crop Science | 2011

Reactions of traditional upland and aerobic rice genotypes to rice root knot nematode(Meloidogyne graminicola)

Kuntal Kanti Das; Dule Zhao; Dirk De Waele; Raj Kumar; Singh Tiwari; Dhirendra Kumar Shrivastava; Arvind Kumar; Metro Manila; Kasteelpark Arenberg

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Arvind Kumar

Indian Institute of Science

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Modesto Amante

International Rice Research Institute

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G.N. Atlin

International Rice Research Institute

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M.J. Espiritu

International Rice Research Institute

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Ramaiah Venuprasad

International Rice Research Institute

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Arvind Kumar

Indian Institute of Science

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Makara Ouk

University of Queensland

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